Question

Find the fourth proportional to 57, 76, 18.​

Answer 1

Answer:

fourth proportional is 23

Step-by-step explanation:

57×x=76×18

x=1368/57

x= 24

Answer 2

Answer:

24 is the fourth proportional to 57, 76, 18.

Step-by-step explanation:

Given :-

• 1st, 2nd and 3rd proportional = 57, 76, 18

To Find :-

• Fourth proportional to 57, 76, 18.

Solution :-

Let the fourth proportional to 57, 76, 18 be 'x',

Ratio formed = 57:76:18:x

As we know,

Product of Extreme Terms = Product of Mean Terms

Extreme Terms = 57 and x

Mean Terms = 76 and 18

$\longrightarrow \: 57 \times x = 76 \times 18 \\ \\ \longrightarrow \: 57x = 1368 \\ \\ \longrightarrow \: x = \frac{1368}{57} \\ \\ \longrightarrow \: x = 24$

Hence,

• Fourth proportional to 57, 76, 18 is 24.
• Ratio = 57:76:18:24